US7347447B2 - Curtain airbag device - Google Patents

Curtain airbag device Download PDF

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Publication number
US7347447B2
US7347447B2 US11/264,265 US26426505A US7347447B2 US 7347447 B2 US7347447 B2 US 7347447B2 US 26426505 A US26426505 A US 26426505A US 7347447 B2 US7347447 B2 US 7347447B2
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US
United States
Prior art keywords
airbag
curtain airbag
connector
guide
garnish
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US11/264,265
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English (en)
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US20060097493A1 (en
Inventor
Ryosuke Nakanishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takata Corp
Original Assignee
Takata Corp
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Filing date
Publication date
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Assigned to TAKATA CORPORATION reassignment TAKATA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKANISHI, RYOSUKE
Publication of US20060097493A1 publication Critical patent/US20060097493A1/en
Application granted granted Critical
Publication of US7347447B2 publication Critical patent/US7347447B2/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/232—Curtain-type airbags deploying mainly in a vertical direction from their top edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R2021/161—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by additional means for controlling deployment trajectory
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23386—External tether means

Definitions

  • the present invention relates to curtain airbag devices equipped with guiding means for guiding curtain airbags deployed along inner side surfaces of vehicle cabins.
  • curtain airbags are deployed downward along inner side surfaces (for example, doors and pillars) of the vehicle cabin so as to protect the head of each vehicle occupant and to keep each vehicle occupant inside the vehicle cabin.
  • U.S. Pat. No. 6,237,938 discloses an example in which a guiding element is disposed along a C pillar. Specifically, such a guiding element is provided for guiding a rear portion of a curtain airbag, which is inflatable along an inner side surface of a vehicle cabin, in the downward direction along pillars.
  • the guiding element includes a track member having a box-shaped cross-section, and a slider which is disposed within the track member and is movable in the longitudinal direction of the track member.
  • a tether (cord) extending from the rear portion of the curtain airbag is tied to the slider.
  • the track member is provided with latches, which are disposed at a regular interval substantially along the entire length of the track member.
  • the top and bottom ends of the track member are provided with mounting flanges.
  • Each of the flanges is fixed to the C pillar with a bolt or a screw.
  • an overhang member projected towards the interior of a vehicle cabin is provided. Specifically, such an overhang member allows the curtain airbag to jump over an upper end of a pillar garnish during the deployment process of the curtain airbag so as to guide the curtain airbag towards the interior of the vehicle cabin.
  • Japanese Unexamined Patent Application Publication No. 2002-347560 and Japanese Unexamined Patent Application Publication No. 2003-81048 each disclose a curtain airbag device in which the rear portion of an inflated curtain airbag is pulled backward with a rope so that a strong tension is created along a lower line of the curtain airbag.
  • the downward movement of the front end of the tether may be held back due to a frictional force generated between the slider and the track member. This may possibly inhibit a smooth deployment process of the curtain airbag.
  • an object of the present invention is to provide a curtain airbag device that allows for smooth downward deployment of a curtain airbag.
  • a curtain airbag device includes a curtain airbag which is capable of being deployed downward along an inner side surface of a vehicle cabin; an inflator for inflating the curtain airbag; a guiding element for guiding the curtain airbag, the guiding element extending in a vertical direction and being attached to a pillar of a vehicle; a linking member for linking the curtain airbag and the guiding element; a linear member whose first end is connected to a lower portion of the curtain airbag and whose second end is connected to the linking member; an upper guide component for guiding the linear member, the upper guide component being disposed in an upper portion of the guiding element or in a vicinity of the upper portion of the guiding element; and a lower guide component for guiding the linear member, the lower guide component being disposed in a lower portion of the guiding element or in a vicinity of the lower portion of the guiding element.
  • the linear member connected to the lower portion of the curtain airbag is linked with the linking member via the upper guide component and the lower guide component in that order.
  • the guiding element may be a guide rod.
  • the linking member may have its base end connected to the curtain airbag and its front end slidably connected to the guide rod.
  • the second end of the linear member may be connected to a midsection of the linking member between the base end and the front end of the linking member, or to a section of the linking member closer to the front end of the linking member from the midsection.
  • the lower guide component may be integrally provided in the lower portion of the guiding element.
  • the curtain airbag may be disposed in a folded manner at an upper portion of the inner side surface of the vehicle cabin.
  • an overhang member projected towards an interior of the vehicle cabin may be provided below the folded curtain airbag disposed at the upper portion of the inner side surface of the vehicle cabin, such that the overhang member guides the curtain airbag towards the interior of the vehicle cabin during a downward deployment process of the curtain airbag.
  • the upper guide component may be provided in the overhang member.
  • the upper guide component may be integrally provided in the upper portion of the guiding element.
  • the curtain airbag device of the present invention when the inflator is activated, the curtain airbag is deployed downward along the inner side surface of the vehicle cabin.
  • the linking member is shifted along the guiding element.
  • the linear member extending from the lower portion of the curtain airbag is linked with the linking member via the upper guide component and the lower guide component.
  • the linking member is pulled downward via the linear member in response to a downward deployment force of the curtain airbag.
  • the linking member is smoothly shifted downward along the guiding element, whereby the curtain airbag is deployed smoothly along the inner side surface of the vehicle cabin.
  • the linking member in a case where the linear member pulls the midsection of the linking member or the section of the linking member closer to the front end thereof (i.e. a section of the linking member closer to the guiding element), the linking member can be shifted downward in an extremely smooth manner along the guiding element. This allows for an extremely smooth deployment process of the curtain airbag.
  • the guide component in a case where the lower guide component or the upper guide component is integrated with the guiding element, the guide component does not need to be installed in the vehicle body in a singular fashion.
  • the installation process of the curtain airbag device in the vehicle body can be simplified.
  • an overhang member for guiding the curtain airbag towards the interior of the vehicle cabin may be disposed below the folded curtain airbag.
  • the upper guide component may be provided in this overhang member. This eliminates the need for installing the upper guide component in the vehicle body in a singular fashion.
  • FIGS. 1( a ) and 1 ( b ) illustrate a curtain airbag device according to an embodiment of the present invention, and includes a schematic view FIG. 1( a ) illustrating a curtain airbag extending along a roof side of a vehicle, and a guide rod disposed along a C pillar; and an enlarged perspective view FIG. 1( b ) illustrating an area indicated by an arrow B in the schematic view FIG. 1( a ).
  • FIGS. 2( a )- 2 ( c ) include schematic cross-sectional views illustrating a deployment action of the curtain airbag shown in FIGS. 1( a ) and 1 ( b ).
  • FIGS. 3( a ) and 3 ( b ) include a perspective view illustrating a state where a pillar garnish is installed, and a side view illustrating a state where the curtain airbag is being deployed.
  • FIGS. 1( a ) and 1 ( b ) illustrate a curtain airbag device according to the embodiment, and includes a schematic view FIG. 1( a ) illustrating a curtain airbag extending along a roof side of a vehicle, and a guide rod disposed along a C pillar; and an enlarged perspective view FIG. 1( b ) illustrating an area indicated by an arrow B in the schematic view FIG. 1( a ).
  • a pillar garnish is omitted and not shown.
  • FIGS. 2( a )- 2 ( c ) include schematic cross-sectional views illustrating a deployment action of the curtain airbag.
  • FIG. 3( a ) is a perspective view showing the same area as FIG. 1( b ) and illustrating a state where a pillar garnish is installed.
  • FIG. 3( b ) is a side view illustrating a state where the curtain airbag is being deployed in the structure shown in FIG. 3( a ).
  • a curtain airbag 1 is disposed along a roof side 2 of a vehicle (a border section between the ceiling and an inner side surface of a vehicle cabin) while being folded in a slender manner in the front-back direction of the vehicle.
  • the curtain airbag 1 is inflated as a result of gas being sent from an inflator 3 .
  • the curtain airbag 1 is deployed in the downward direction of the vehicle body along the side surface, i.e. doors and pillars, in the vehicle cabin.
  • An upper edge of the curtain airbag 1 is provided with tabs (not shown). The tabs are fastened to the roof side 2 .
  • a C-pillar 4 in the vehicle has a guide rod 5 serving as a guiding element attached thereto, which guides the rear portion of the curtain airbag 1 along the C pillar 4 when the curtain airbag 1 is deployed along the C pillar 4 in the downward direction of the vehicle body.
  • the guide rod 5 has a rod-like structure which extends along the C pillar 4 in the vertical direction of the vehicle body. Both the upper and lower ends of the guide rod 5 are fixed to the C pillar 4 with bolts 6 .
  • the bottom corner area in the rear portion of the curtain airbag 1 has a base end of a link strap 7 , functioning as a linking member, attached thereto.
  • a front end of the link strap 7 is provided with a loop 7 a which is loosely wound around the guide rod 5 .
  • the loop 7 a can be moved vertically along the guide rod 5 .
  • a pillar garnish 8 covers the cabin-side of the C pillar 4 .
  • the door-frame portion of the C pillar 4 has a weather strip (not shown) attached thereto.
  • a side edge of the pillar garnish 8 is in contact with the weather strip.
  • An overhang member 10 also known as a jump base, is disposed on the roof side 2 above the C pillar 4 .
  • the overhang member 10 allows the curtain airbag 1 to jump over and pass over the top of the pillar garnish 8 so that the curtain airbag 1 is guided towards the interior of the vehicle cabin.
  • a projected segment 10 a of the overhang member 10 protrudes downslope from the roof side 2 towards the interior of the vehicle cabin.
  • Attachment segments 10 b provided on the upper side of the overhang member 10 are fixed to the roof side 2 with, for example, bolts or rivets.
  • a linear member 20 extends between the lower portion of the curtain airbag 1 and the link strap 7 .
  • the linear member 20 extends through an upper guide component 21 defined by a hole provided in the projected segment 10 a of the overhang member 10 and also through a lower guide component 22 integrally provided in the lower portion of the guide rod 5 .
  • the linear member 20 protrudes downward from the folded curtain airbag 1 , extends through the upper guide component (hole) 21 , and extends downward along the guide rod 5 .
  • the linear member 20 is hooked through the lower guide component 22 , which is laterally U-shaped.
  • the linear member 20 extending through the lower guide component 22 is bent so as to extend upward, and is connected to the link strap 7 .
  • the linear member 20 is connected to a section of the link strap 7 that is closer to the front end thereof from the midsection of the link strap 7 between the base end and the front end (loop 7 a ).
  • the linear member 20 may be connected to the loop 7 a.
  • the roof side 2 is provided with a roof-side garnish such that the curtain airbag 1 is also covered with the roof-side garnish.
  • the roof-side garnish abuts on the pillar garnish 8 .
  • the inflator 3 When a vehicle provided with such a curtain airbag device is involved in a side-on collision or a rollover, the inflator 3 generates gas so as to start inflating the curtain airbag 1 . Then, the curtain airbag 1 pushes open the roof-side garnish, and the projected segment 10 a of the overhang member 10 allows the curtain airbag 1 to jump over the top end of the pillar garnish 8 , as shown in FIGS. 2( b ) and 3 ( b ), so as to guide the curtain airbag 1 towards the interior of the vehicle cabin. Subsequently, the curtain airbag 1 is deployed downward along the cabin-side of the pillar garnish 8 .
  • the rear portion of the deploying curtain airbag 1 is guided by the guide rod 5 via the link strap 7 .
  • the link strap 7 starts moving downward along the guide rod 5 as the deployment process of the curtain airbag 1 begins.
  • the link strap 7 enters a space between the pillar garnish 8 and the weather strip.
  • the link strap 7 moves downward while ripping through the pillar garnish 8 and the weather strip.
  • the link strap 7 moves downward along the guide rod 5 with the curtain airbag 1 until the curtain airbag 1 reaches the bottommost point of deployment. Since the link strap 7 connects the curtain airbag 1 and the guide rod 5 , the curtain airbag 1 can be deployed along the side surface of the vehicle cabin.
  • the curtain airbag 1 in a completely deployed state protects the head of a vehicle occupant. In this deployed state, since tension is created in the curtain airbag 1 , the curtain airbag 1 is capable of retaining the vehicle occupant inside the vehicle cabin.
  • the linear member 20 when the curtain airbag 1 is being deployed downward, the linear member 20 is pulled by the curtain airbag 1 . Since the linear member 20 pulls the loop 7 a of the link strap 7 downward, the link strap 7 moves downward smoothly along the guide rod 5 , whereby smooth deployment of the curtain airbag 1 is achieved.
  • the installation of the upper guide component 21 is achieved simultaneously with the installation of the overhang member 10 .
  • the lower guide component 22 is integrally provided in the guide rod 5 , the installation of the lower guide component 22 is achieved simultaneously with the installation of the guide rod 5 . Accordingly, because each of the guide components 21 , 22 is not singularly installed in the vehicle body, the installation process of the curtain airbag device in the vehicle body is simplified.
  • a U-shaped upper guide component may alternatively be disposed in the upper portion of the guide rod 5 .
  • each of the guide components 21 , 22 may alternatively be installed in the vehicle body in a singular fashion.
  • a slider may be connected to the link strap 7 such that the slider is slidable along the guide rod 5 .
  • the linear member 20 may be connected to the slider.
  • the guide rod 5 and the overhang member 10 may alternatively be disposed in a manner such that the curtain airbag 1 is guided along a B-pillar or an A-pillar.
  • an alternative guiding element may be used in place of the guide rod 5 .
  • overhang member 10 may alternatively be omitted in the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
US11/264,265 2004-11-05 2005-11-01 Curtain airbag device Expired - Fee Related US7347447B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004322519A JP2006131104A (ja) 2004-11-05 2004-11-05 カーテンエアバッグ装置
JP2004-322519 2004-11-05

Publications (2)

Publication Number Publication Date
US20060097493A1 US20060097493A1 (en) 2006-05-11
US7347447B2 true US7347447B2 (en) 2008-03-25

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US11/264,265 Expired - Fee Related US7347447B2 (en) 2004-11-05 2005-11-01 Curtain airbag device

Country Status (5)

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US (1) US7347447B2 (de)
EP (1) EP1655182B1 (de)
JP (1) JP2006131104A (de)
CN (1) CN1769101A (de)
DE (1) DE602005003632T2 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080054605A1 (en) * 2006-08-31 2008-03-06 Toyota Jidosha Kabushiki Kaisha Head protecting airbag system
US20080106082A1 (en) * 2006-11-07 2008-05-08 Jae Ho Choi Dynamic ramp apparatus for curtain airbag in automobile
US20080111354A1 (en) * 2006-11-10 2008-05-15 Seung Soo Ryu Apparatus for guiding deployment of curtain airbag for vehicle
US20120205897A1 (en) * 2010-09-22 2012-08-16 Trw Automotive Gmbh Airbag protection device for a vehicle occupant restraint system and method of manufacturing an airbag protection device
US8967661B2 (en) 2013-05-23 2015-03-03 Nissan North America, Inc. Vehicle body structure
US20160121838A1 (en) * 2014-10-29 2016-05-05 Hyundai Mobis Co., Ltd. Curtain airbag apparatus and method of manufacturing the same
US9333934B2 (en) 2014-06-13 2016-05-10 Nissan North America, Inc. Vehicle body structure
US20210101556A1 (en) * 2019-10-02 2021-04-08 Ford Global Technologies, Llc Vehicle airbag
US20230021237A1 (en) * 2021-07-14 2023-01-19 Hyundai Motor Company Curtain airbag apparatus for vehicle
US12017601B2 (en) * 2022-11-10 2024-06-25 ZF Passive Safety Systems US Inc. Mounting bracket for curtain airbag

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JP4269928B2 (ja) * 2003-12-19 2009-05-27 タカタ株式会社 カーテンエアバッグのガイド装置及びカーテンエアバッグ装置
JP4765620B2 (ja) * 2005-12-28 2011-09-07 タカタ株式会社 車両乗員拘束装置
JP4811163B2 (ja) * 2006-07-21 2011-11-09 マツダ株式会社 カーテンエアバッグ装置
JP4760587B2 (ja) * 2006-07-21 2011-08-31 マツダ株式会社 カーテンエアバッグ装置
JP4710747B2 (ja) * 2006-07-26 2011-06-29 マツダ株式会社 カーテンエアバッグ装置
JP2008037245A (ja) * 2006-08-04 2008-02-21 Mazda Motor Corp カーテンエアバッグ装置
JP4830706B2 (ja) * 2006-08-04 2011-12-07 マツダ株式会社 カーテンエアバッグ装置
KR101242751B1 (ko) * 2011-02-11 2013-03-11 아우토리브 디벨롭먼트 아베 커튼 에어백 모듈
JP6105544B2 (ja) * 2014-11-06 2017-03-29 本田技研工業株式会社 車両後部構造
WO2019093001A1 (ja) * 2017-11-09 2019-05-16 テイ・エス テック株式会社 サイドエアバッグ装置
DE102020130394A1 (de) 2020-11-18 2022-05-19 Bayerische Motoren Werke Aktiengesellschaft Airbagvorrichtung für einen Kraftwagen sowie Airbaganordnung einer Airbagvorrichtung an einem Rahmen eines Kraftwagens

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US6896288B2 (en) * 2002-07-22 2005-05-24 Takata Corporation Guide member for curtain airbag
JP2004067045A (ja) 2002-08-09 2004-03-04 Toyoda Gosei Co Ltd 頭部保護エアバッグ装置
US6964431B2 (en) * 2002-09-30 2005-11-15 Tk Holdings, Inc. Loop cord slide device for airbag
US7004498B2 (en) * 2003-04-24 2006-02-28 Michael Daines Compact tethering system and method for an inflatable curtain

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080054605A1 (en) * 2006-08-31 2008-03-06 Toyota Jidosha Kabushiki Kaisha Head protecting airbag system
US7806433B2 (en) * 2006-08-31 2010-10-05 Toyota Jidosha Kabushiki Kaisha Head protecting airbag system
US20080106082A1 (en) * 2006-11-07 2008-05-08 Jae Ho Choi Dynamic ramp apparatus for curtain airbag in automobile
US7641227B2 (en) * 2006-11-07 2010-01-05 Hyundai Motor Company Dynamic ramp apparatus for curtain airbag in automobile
US20080111354A1 (en) * 2006-11-10 2008-05-15 Seung Soo Ryu Apparatus for guiding deployment of curtain airbag for vehicle
US20120205897A1 (en) * 2010-09-22 2012-08-16 Trw Automotive Gmbh Airbag protection device for a vehicle occupant restraint system and method of manufacturing an airbag protection device
US8632093B2 (en) * 2010-09-22 2014-01-21 Trw Automotive Gmbh Airbag protection device for a vehicle occupant restraint system and method of manufacturing an airbag protection device
US9321422B2 (en) 2013-05-23 2016-04-26 Nissan North America, Inc. Vehicle body structure
US8967661B2 (en) 2013-05-23 2015-03-03 Nissan North America, Inc. Vehicle body structure
US9333934B2 (en) 2014-06-13 2016-05-10 Nissan North America, Inc. Vehicle body structure
US20160121838A1 (en) * 2014-10-29 2016-05-05 Hyundai Mobis Co., Ltd. Curtain airbag apparatus and method of manufacturing the same
US9713999B2 (en) * 2014-10-29 2017-07-25 Hyundai Mobis Co., Ltd. Curtain airbag apparatus and method of manufacturing the same
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DE602005003632D1 (de) 2008-01-17
DE602005003632T2 (de) 2008-04-10
EP1655182A2 (de) 2006-05-10
US20060097493A1 (en) 2006-05-11
EP1655182A3 (de) 2006-09-20
JP2006131104A (ja) 2006-05-25
CN1769101A (zh) 2006-05-10
EP1655182B1 (de) 2007-12-05

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